Following the first 3-month trial, patients with reversion of angina and improvement of ECG abnormalities of ischemia will have low doses of amiloride (5 to 7.5 mg), while nitrates, B-blockers or Calcium Channel Blockers will be progressively discontinued, if no evidence of angina occurred, and if no new no ECG ST-T alteration of ischemia developed. Therefore, amiloride with/without aspirin, Statins and medication for hypertension or diabetes, will be the established treatment until the end of trial.